MTM CASE-GARD J-20 series ammunition cases are a favorite of rifle enthusiasts throughout the world. Made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract. The CASE-GARD J-20’s are available in five sizes. All rounds are listed bullet up position.

Some reloaders don’t like the lid touching there bullets, so the lid dimension below is for them. There are a lot of reloaders that expand the case as much as half inch and claim no problems with accuracy.

J-20-L

220 Swift, 224 Clark, 225 / 25-284 / 270 / 284 / 307 / 308 / 356 Win., 240 Wby. Mag., 25-06 / 244 / 280 / 6mm / 7mm-08mm Rem., 257 Roberts, 30-06 Spr., 30-30 Win., 30-40 Krag., 308 Marlin Exp., 360 Nitro Express 2 1/4”, 375 Rimless 2 1/4”, 32 Win. Spl., 338 Fed., 35 Whelen, 350 Legend, 376 Steyr, 444 Marlin, 400-375 Belterd Nitro Exp., 6.5 Carcano, 6 / 6.5 Creedmoor, 6.5×257 Roberts, 6.5-284 Lapua, 6.5×50 Jap. Arisaka, 6.5×52 Italian, 6.5x54mm Mann-Schoen, 6.5x55mm Swedish, 6.5-06 A-Square, 6.5-284 Norma, 6mm-284 Win., 7×57 / 7MM PRC / 7.65×53 / 9.3x57mm / 10.75×68 Mauser, 7×64 Brenneke, 7.5×55 Swiss, 7.7×58 Jap., 7-30 Waters, 7.35 Carcano, 7.5 Schmidt Rubin Swiss, 7.5×54 French MAS, 7.5×55 Swiss, 7.7×58 Jap., 7-30 Waters, 8x57J, 8mm-06, 9.3×74, 9.3×62, 9.5×57.

Lid is at 3.36″ OAL.

MTM Rifle Calibre Ammo Box Size Chart;